Thomas barrow



T. BARROW. BOILER STAY (No Model.)

No. 593,452. Patented Nov. 9.1897.

INVENTU flaw 1441 gam t- 7 WITNE s s: s

AIIDRNEY.

THE norms warns co, WYO-m wnnmdmu, n. a.

UNITED STATES PATENT 0FFICE.

THOMAS BARROW, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE FRASER CHALMERS, OF SAME PLACE.

BOILER-STAY.

SPECIFICATION forming part of Letters Patent No. 593,452, dated November 9, 1897.

Application filed March 29, 1897.

To all whom it may concern:

Be it known that I, THOMAS BARROW, a subject of the Queen of Great Britain, residing at Chicago, in the county of Cook, State of Illinois, have invented a certain new and useful Improvement in Boiler-Stays, of which the following is a full, clear, and exact specification. 7

It has been found in practice that the strain upon the feet of boiler-stays, when attached to the head of a boiler, subjects them to severe stress, to such an extent that the rivets are stripped of their heads or the rivets become loosened and leave the brace liable to become detached and displaced and so expose the boiler to the weakness against which the stays are designed to act as a guard.

The object of my invention is an improved boiler-stay which will lessen the strain upon the rivets connecting the foot of the stay with the boiler-head and so prevent the heads being stripped off the rivets and prevent any springing of the stays at this point.

My invention consists in the novel features of construction described herein and defined in the claims.

In the accompanying drawings, which constitute a part of this application, Figure 1 is a side view in perspective of my improved boiler-stay. Fig. 2 is a front view of the same, and Fig. 3 is a perspective view of the foot of the stay with the braces terminating in the shank.

My improved boiler-stay consists of the shank A, having its sides folded together, as illustrated, the shank terminating at one end in a flat body B, adapted to be bent to the required form for attaching it to the cylindrical shell of the boiler. Holes 19 b are made through the flat body portion near its end, substantially as illustrated, to provide for attaching the flattened end of the stay to the cylindrical shell of a boiler. Said shank terminates at its opposite end in a fiat web 0, and the web is provided with an upturned foot D, having the rivet-holes d d for attach-- ing the same to the head of a boiler. Below the shank portion A, opposite to the web 0,

Serial No. 629,738. (No model.)

the folded sides of the shank spread out into braces A A, said braces being connected with the ends of the foot, substantially as illustrated.

The form of flattened web and braces into which the shank of the brace terminates and the termination of said web and braces into the foot, as illustrated, distributes the strain upon the foot of the stay over its entire area, and in whatever direction the strain is exerted upon the stay the stay is so braced that the rivets are practically relieved of the greater part of the strain,-and the function of the rivets is limited to simply maintaining the foot of the stay in place.

I am aware that boiler-stays have heretofore been made having a shank with its sides folded or having a U-shaped shank, terminating in a flat body. I do not, however, claim such features, and they do not anticipate my invention.

IVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The within described boiler stay consisting of a folded shank terminating at one end in a flat body'adapted to be secured to a boiler-shell, said shank terminating at its opposite end in a web having a foot with rivetholes for securing the same to the boiler-head, the sides of the shank spreading at the web and being connected with the ends of the foot, substantially as described.

2. A boiler-stay consisting of a shank havcured to a boiler-shell, said shank terminating at its opposite end in a web having a foot for THOMAS BARROW.

Witnesses:

E. D. 'OHALMEEs, GEO. A. GRABER.

ing one end flattened and adapted to be sesecuring the same to the boiler-head, the sides 

